Kevlar® Spun Threads
100% Kevlar® spun sewing threads proudly made in the USA. Manufactured to meet A-A-55195 Type I, these threads deliver consistent quality, durability, and performance, while also qualifying as Berry Amendment compliant. Available in Natural Yellow or Black, Kevlar® spun threads provide excellent strength and dependable thermal resistance for demanding applications.
Designed for workwear, protective apparel, and mattresses, these spun threads offer a balanced combination of strength, sewability, and heat resistance. Supplied on standard 6,000-yard spools, with custom sizes and constructions available upon request. A customer-specific, batch-level Certificate of Analysis (COA), including full lot traceability, is available upon request.
About This Item
Product Details
Kevlar® Spun Thread
A technical para-aramid spun sewing thread for medium-duty applications that require dependable seam strength, heat resistance, and USA-made quality.
Key Product Attributes
- Fiber: 100% Kevlar® staple fiber spun yarn
- Specification: Manufactured to conform to A-A-55195 Type I
- Origin: Made in the USA
- Compliance: Berry Amendment Compliant
- Put-Up: Splice-free continuous length per spool
Performance
Performance That Matters
Kevlar® spun thread offers a practical balance of strength and heat resistance for demanding sewing environments.
Why Customers Choose It
- Higher tensile strength than meta-aramid spun threads
- Good heat resistance for elevated-temperature applications
- Strong seam durability for technical and industrial sewing
- Controlled elongation for more stable stitching
- Versatile use across protective, industrial, and reinforcement products
Kevlar® Spun Threads Technical Specifications
| PROPERTY | TEX 40 | TEX 60 | TEX 80 |
|---|---|---|---|
| Fiber Type | Kevlar® | Kevlar® | Kevlar® |
| # of Plies | 2 | 3 | 4 |
| Approximate Diameter |
0.235 mm (0.009") |
0.288 mm (0.011") |
0.332 mm (0.013") |
| Min. Break Strength (Initial) |
6.0 lbf |
8.5 lbf |
12.0 lbf |
| MIN. Break Strength (Post Heat Aging) |
1.80 lbf |
3.00 lbf |
3.25 lbf |
| Max. Elongation (%) |
6% | 6% | 6% |
| Yield (ft/lb) |
37310 | 25000 | 18860 |
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Kevlar® Resistance Guide
Para-aramid fibers, such as Kevlar®, exhibit excellent resistance to high temperatures, maintaining their mechanical properties even at elevated temperatures. This heat resistance makes them suitable for applications in thermal insulation and protective clothing. Additionally, Kevlar® fibers demonstrate good chemical resistance, enabling them to withstand exposure to acids, alkalis, and many organic solvents without significant degradation.
This fiber will degrade with prolonged UV light exposure. These fibers will brown and weaken over time. Please keep this fiber stored away in a dark room and in the UV protective bag the fiber was shipped in.
This fiber will absorb atmospheric moisture up to 5-7% in weight. This fiber should be stored in a cool, dry room with low humidity. A desiccant bag was included with this fiber to prevent regain during transit and short-term storage at your facility.
Acid: Prolonged exposure to concentrated strong acids will cause degradation
Alkali: Degrades with prolonged exposure to Sodium Hypochlorite
Organic Solvent: Moderate degradation in Carbon Tetrachloride and Ethylene Glycol
Continuous Operating Temperature Range (°C): -40 to 170
Short Term Exposure (°C): 420
Degradation Temperature (°C): 480
Product Recommendation Guide
Tex |
Garment Type | Suggested Needle Size |
|---|---|---|
40 |
Light to Medium Garments | 12-14 |
60 |
Medium to Heavy Garments | 14-16 |
80 |
Heavy Garments | 16-18 |
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Suggested Applications
- Aerospace
- Fire Safety
- Flame Retardant Clothing
- Industrial Safety Gear
- Medical Textiles
- Embroidery
- Clothing & Apparel
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